Question

which of the following statements describes a consequence of gold and silver mining that affected indigenous people in the mid - 1800s?
plows needed for gold and silver mines destroyed native grasses.
the cutting down of timber for gold and silver mines led to a decrease in forests.
debris from gold and silver mines polluted the supplies of drinking water.
fences needed for gold and silver mines limited the movement of wild game.

Explanation:

During the mid - 1800s gold and silver mining, debris from the mines (such as toxic chemicals and sediment) entered water sources. Indigenous people relied on these water sources for drinking, cooking, and other daily activities. Polluted water directly affected their health and well - being.
Plows were more associated with farming rather than a major consequence of mining for Indigenous people in the context of the mid - 1800s impact. The decrease in forests due to timber cutting for mines was more of a general environmental impact rather than a specific consequence that directly affected Indigenous people in the most significant way compared to water pollution. Fences limiting wild game movement was not as direct a consequence of mining on Indigenous people as water pollution.

Answer:

Debris from gold and silver mines polluted the supplies of drinking water.